Machine for producing folded boxes



Dec. 28, 1965 FUCHS 3,225,667

MACHINE FOR PRODUCING FOLDED BOXES Filed July 1, 1963 3 Sheets-Sheet 1FIG. 7

Dec. 28, 1965 M. FUCHS MACHINE FOR PRODUCING FOLDED BOXES 3 Sheets-Sheet2 Filed July 1, 1963 YQUIO FIG. 2

Dec. 28, 1965 M. FUCHS 3,225,667

MACHINE FOR PRODUCING FOLDED BOXES Filed July 1, 1963 3 Sheets-Sheet 3FIG. 5

United States l' atent O 3,225,667 MACHINE FOR PRODUCING FOLDED BOXESMartin Fuchs, Munster, Westphalia, Germany, assignor to Fr. HesserMaschinenfabrik-Aktiengesellschait, Stuttgart-Bad Cannstatt, GermanyFiled July 1, 1963, Ser. No. 292,022 Claims priority, applicationGermany, July 3, 1962, H 46,273 8 Claims. (Cl. 9344.1)

This invention is concerned with a machine for producing folded boxeseach having an inner lining bag and a reinforcing collar in the liningbag which serves primarily as a guide for the top of the folded boxwhich is in the form of a hinged snap cover.

The primary object of the invention is to provide in a machine of thiskind furnished with a mandrel wheel an apparatus which enables theaforesaid reinforcing collars to be fed to the machine and fastenedinside the lining bags without impairing the output of the machine.

Broadly considered the machine of the present invention comprises, incombination, at least one forming mandrel, apparatus for feeding to theforming mandrel from a supply roll a web of packaging material,apparatus for feeding toward the path of feed of the web of packagingmaterial from a supply roll a web of stiff material, the width of whichis equal to the length of a reinforcing collar, a cutting devicearranged along the path of feed of the web of stiff material andadjacent the path of feed of the web of packaging material for severingreinforcing collar strips from this web, a fastening device arrangedalong the path of feed of the web of packaging material for fasteningthe reinforcing collar strips to this web at regular distances from oneanother, a cutting device arranged along the path of feed of the web ofpackaging material after the lastrnentioned device for dividing this webinto individual lining bag blanks, each with a reinforcing collar stripthereon, and a folding tool associated with the forming mandrel forfolding the lining bag blanks around the mandrel.

A preferred embodiment of machine according to the invention will now bedescribed, by way of example, with reference to the accompanyingdrawings.

In these drawings:

FIGURE 1 is a side view of the machine,

FIGURE 2 is a plan view of the machine,

FIGURE 3 is a diagrammatic illustration of a package produced by themachine,

FIGURE 4 shows the device for forming the lining bag of the package atthe beginning of its working stroke, and

FIGURE 5 shows this device at the end of its working stroke.

In the machine illustrated in the drawings, folded boxes S of theconstruction shown in FIGURE 3 having lining bags F are produced in theknown way on the forming mandrels 1 of an intermittently rotatablemandrel wheel 2. The packaging material for the lining bags F is heatscalable and is drawn from a supply roll 4 in the form of a web 3, beingcut into appropriate lengths by a cutting device 5, 6 and these thenbeing fed to one of the stations of the mandrel wheel 2 for theformation of the lining bags. The packaging material for the foldedboxes S is fed to a further station of the wheel in the form ofstamped-out cardboard blanks Z and these blanks are there folded aroundthe formed lining bags F.

The web 3 is drawn over a floating diverting roller 7, between a pair ofdraw rollers 8, 9, over a floating roller 10 and a diverting roller 11and then through a pair of intermittently rotatable draw rollers 12, 13.The pair of draw rollers 8, 9 are driven by a sprocket 59 through achain 40 from a sprocket 39 secured on the main driving shaft 38 of themachine. The intermittent drive of the pair of draw rollers 12, 13 isperformed by a crank mechanism 42 the stroke of which is adjustable,this crank mechanism being connected through a sprocket 41 and the chain40 to the support 39 on the driving shaft 38. A toothed segment 43connected to the crank mechanism 42 meshes with a gear wheel 44 which isrigidly connected to a free wheel 45. This free wheel is, in turn,connected through gear wheels 46 and 47 to the draw roller 13.

Arranged in the plane of the horizontal feed of the web 3 and betweenthe diverting roller 11 and the pair of draw rollers 12, 13 is afastening device which functions to fasten strips 18 of cardboard to theweb 3 at specific distances from one another. This device comprises twostationary sealing members 14, 15 arranged below the aforesaid plane anda periodically operable die 16 which is arranged above this plane and ismovable vertically with respect to these sealing members. The sealingmembers 14, 15 each has on its upper surface a resistance strip 17 forimpulse scaling. Furthermore, these scaling members 14, 15 are arrangedat such a spacing from one another that each cardboard strip 18 placedon and tacked to the web 3 is only heat sealed at its margins to the web3.

The cardboard strips 18 are severed from a web 19 of cardboard drawnfrom a supply roll 20. For this purpose, there are provided a pair ofdraw rollers 21, 22 of which the diameters are such that, in eachworking stroke, they advance the web 19 through a distance which isequal to the length of one cardboard strip 18, and a periodicallyoperable cutting device 23, 24. The draw roller 22 is driven by asprocket 60 through the chain 40 from the main driving shaft. During acutting operation, the web 19 is pressed against the counter knife 24 ofthis device by a holding die 25 which is operable simultaneously withthe cutting knife 23, and is thereby held in this position. As a resultof the continual advance of the web 19, a loop is periodically formed inthis web, but the latter is straightened out immediately the holding die25 is raised. The cutting knife 23 is secured to a yoke 48 which ismovable up and down by means of a rocking lever 49 actuated by a cam 50.This cam 50 is driven through a sprocket 51 by the chain 40. Alsosecured to the yoke 48 are the holding die 25 and the pressing dies 27and 16 of a tacking device (to be described in detail below) and thefastening device respectively.

The cutting device 23, 24 is so arranged relatively to the path of feedof the web 3 that the cardboard strips 18 severed from the web 19 arecorrectly placed on the web 3. The distance of the cutting device 23, 24from the end face of the mandrel which is aligned with the web 3, isequal to the total length of a plurality of blanks.

To prevent each cardboard strip 18 from slipping on the web 3 there isprovided behind the diverting roller 11 and in the path of movement ofthe web 3 a tacking device. This device comprises a stationary sealingmember 26, preferably impulse heated, and a pressing die 27 which ismovable periodically relatively to the sealing member. During loweringof the cutting knife 23, the die 27 presses the cardboard strip 18concerned against the web 3 and the sealing member 26 so that the strip18 is tacked to the web 3 by heating impulses before it is completelysecured to the web by the succeeding sealing members 14, 15 and the die16. The web 3 with the cardboard strip 18 secured thereto is then fed toone of 3 the forming mandrels 1 of the mandrel wheel 2 so that the rearedge of the strip 18 extending transversely across the web 3 comes intoa position fiush with the end face of this forming mandrel. Accordingly,when the blank for the lining bag F, severed from the web 3 by thecutting device 5, 6, is folded around the mandrel 1, the cardboard strip18 forms a stiff, U-shaped collar K for the comparatively limp liningbag F. Folding of the blank around the mandrel 1 is performed in theknown way by means of a folding tool 61. To this end, the folding tool61 is movable up and down through its rod 62 by a linkage 64 having aroller 66 running in a groove in a cam plate 65. Arranged in the foldingtool 61 is a die 63 which, when the tool 61 is raised, resilientlypresses the blank concerned against the underside of the folding mandrel1 under the action of a spring 67, whilst the folding tool 61 itselffolds the two side parts of the blank up against the mandrel.

The longitudinal seam of the lining bag F is produced by two sealingtools 52, 53 mounted in pincer fashion. These sealing tools 52, 53 areoperated through a link age '55 from a cam 54 connected to a sprocket 56which is connected through a chain 57 to a sprocket 58 on the maindriving shaft 38 of the machine.

The lining bag F is closed at the end containing the collar K in theknown way by a top closure having two triangular corner folds 28 sothat, when a hinged, snap cover 29 provided on the folded box S andformed by incisions 30, 31, 32 in the cardboard blank Z is opened, oneof the corner folds 28 is freed.

The outer end of each forming mandrel 1 is rebated at 33, 34 and 35 onits underside and on the two adjoining sides. These rebates correspondin width and depth to a cardboard strip 18 so that the latter can beaccommodated therein when folded on the mandrel.

In addition, there is provided in advance of the pair of draw rollers21, 22 a grooving tool comprising two grooving plates 36 and a counterroller 37 for grooving the strips 18 at the zones of the folds intendedto be formed on the forming mandrels 1.

If desired, the cardboard strips 18 may be fastened to the web 3 bymeans of any suitable adhesive. In this case, a known adhesive-applyingdevice may be provided in place of the sealing device on the path offeed of the web at a position in front of the point where the strips arefed in.

Iclaim:

1 A machine for producing folded boxes each having anmner lining bag anda stiff reinforcing collar in the lining bag, comprising, incombination, at least one formmg mandrel, apparatus for feeding to theforming mandrel from a supply roll a web of packaging material,apparatus for feeding towards the path of feed of the web of packagingmaterial from a supply roll a web of stiff material, the width of whichis equal to the length of a reinforcing collar, a cutting devicearranged along the path of feed of the web of stiff material andadjacent the path of feed of the Web of packaging material for severingreinforcing collar strips from the web of stiff material, a fasteningdevice arranged along the path of feed of the Web of packaging materialfor fastening the reinforcing collar strips to this web at regulardistances from one another, a cutting device arranged along the path offeed of the Web of packaging material after the last-mentioned devicefor dividing this web into individual lining bag blanks, each with areinforcing collar strip thereon, and a folding tool associated with theforming mandrel for folding the lining bag blanks around the mandrel.

2. A machine for producing folded boxes each having an inner lining bagand a cardboard reinforcing collar of U-shape in the lining bag,comprising, in combination, a mandrel wheel comprising a plurality offorming mandrels, apparatus comprising a pair of draw rollers forfeeding in a horizontal plane to the forming mandrels a Web of packagingmaterial from a supply roll, apparatus for feeding towards the path offeed of the web of packaging material in a horizontal plane a web ofcardboard from a supply roll, the width of which is equal to the lengthof a reinforcing collar, a cutting device arranged along the path offeed of the web of cardboard and adjacent the path of feed of the web ofpackaging material for severing reinforcing collar strips from the webof cardboard, this device being so arranged relatively to the path offeed of the web of packaging material that the reinforcing collar stripsare correctly positioned on this web, a device arranged along the pathof feed of the web of packaging material for fastening the reinforcingcollar strips to the web of packaging material at regular distances fromone another, a cutting device arranged along the path of feed of the webof packaging material after the last-mentioned device for dividing thisweb into individual lining bag blanks, each with a reinforcing collarstrip thereon, and a folding tool associated with the mandrel wheel forfolding the lining bag blanks around the forming mandrels.

3. A machine for producing folded boxes each having an inner lining bagand stitf reinforcing collar in the lining bag, comprising, incombination, at least one forming mandrel, apparatus for feeding to theforming mandrel from a supply roll a web of packaging material,apparatus for feeding towards the path of feed of the web of packagingmaterial from a supply roll a web of stiff material, the width of whichis equal to the length of a reinforcing collar, 2. cutting devicearranged along the path of feed of the web of stiff material andadjacent the path of feed of the web of packaging material for severingreinforcing collar strips rom the web of stiff material, a tackingdevice associated with this cutting device for tacking the reinforcingcollar strips to the web of packaging material at regular distances fromone another, means for operating this tacking device simultaneously withthe operation of the cutting device, a fastening device arranged alongthe path of feed of the packaging material after the tacking device forfirmly fastening the reinforcing collar strips to this web, a cuttingdevice arranged along the path of feed of the web of packaging materialafter the fastening device for dividing this web into individual liningbag blanks, each with a reinforcing collar strip thereon, and a foldingtool associated with the forming mandrel for folding the lining bagblanks around the mandrel.

4. A machine as claimed in claim 3 for producing folded boxes havinglining bags made from a heat sealable packaging material, wherein thetacking device comprises a sealing jaw and a counter die and means forheating the sealing jaw.

5. A machine as claimed in claim 4, wherein the fastening device forfirmly fastening the reinforcing collar strips to the web of packagingmaterial comprises two sealing members and a counter pressure die andelectrical impulse-heating means for heating the sealing members.

6. A machine for producing folded boxes each having an inner lining bagand stiff reinforcing collar in the lining bag, comprising, incombination, at least one forming mandrel, apparatus for feeding to theforming mandrel from a supply roll a web of packaging material,apparatus for feeding towards the path of feed of the web of packagingmaterial from a supply roll a web of stiff material, the width of whichis equal to the length of a reinforcing collar, a cutting devicearranged along the path of feed of the web of stiff material andadjacent the path of feed of the web of packaging material for severingreinforcing collar strips from the web of stiff material, grooving toolsarranged along the path of feed of the web of stiff material for forminggrooves in the reinforcing collar strips at the zones of the intendedfolds in these strips, a fastening device arranged along the path offeed of the web of packaging material for fastening the reinforcingcollar strips to this web at regular distances from one another, acutting device arranged along the path of feed of the web of packagingmaterial after the last-mentioned device for dividing this web intoindividual lining bag blanks, each with a reinforcing collar stripthereon, and a folding tool associated with the forming mandrel forfolding the lining bag blanks around the mandrel.

7. A machine for producing folded boxes each having an inner lining bagand stiff reinforcing collar in the lining bag, comprising, incombination, at least one forming mandrel, apparatus for feeding to theforming mandrel from a supply roll a web of packaging material,apparatus for feeding towards the path of feed of the web of packagingmaterial from a supply roll a web of stiff material, the width of whichis equal to the length of a reinforcing collar, a cutting devicearranged along the path of feed of the web of stiff material andadjacent the path of feed of the web of packaging material for severingreinforcing collar strips from the web of stiff material, a fasteningdevice arranged along the path of feed of the web of packaging materialfor fastening the reinforcing collar strips to this web at regulardistances from one another, a cutting device arranged along the path offeed of the web of packaging material after the last-mentioned devicefor dividing this web into individual lining bag blanks, each with areinforcing collar strip thereon, and a folding tool associated with theforming mandrel for folding the lining bag blanks around the mandrel,the forming mandrel being rebated on its sides at one end andthe widthand depth of these rebates being equal to the width and depth of thereinforcing collar strips so as to accommodate the latter when folded onthe mandrel.

8. A machine for producing folded boxes each having an inner lining bagand a reinforcing collar of cardboard in the lining bag, comprising, incombination, at least one forming mandrel, apparatus comprising a pairof draw rollers for feeding to the forming mandrel a web of packagingmaterial from a supply roll, apparatus for feeding towards the path offeed of the web of packaging material a web of cardboard from a supplyroll, the width of the cardboard web being equal to the length of areinforcing collar, a cutting device arranged along the path of feed ofthe web of cardboard and adjacent the path of feed of the web ofpackaging material for severing reinforcing collar strips from thecardboard web, grooving tools arranged along the path of feed of thecardboard web for forming grooves in the reinforcing collar strips atthe zones of the intended folds, a tacking device arranged adjacent toand after the cutting device for tacking the reinforcing collar stripsto the web of packaging material at regular distances from one another,a fastening device arranged along the path of feed of the packagingmaterial after the tacking device for fastening the reinforcing collarstrips to this web, a cutting device arranged along the path of feed ofthe web of packaging material after the fastening device for dividingthis web into individual lining bag blanks, each with a reinforcingcollar strip thereon, and a folding tool associated with the foldingmandrel for folding the lining bag blanks around the mandrel, theforming mandrel being rebated on its sides at one end and the width anddepth of these rebates being equal to the width and depth respectivelyof the reinforcing collar strips.

References Cited by the Examiner UNITED STATES PATENTS 1/1957 Fischer etal. 4336.6 1/1961 Vergobbi 4336.01

2. A MACHINE FOR PRODUCING FOLDED BOXES EACH HAVING AN INNER LINING BAGAND A CARDBOARD REINFORCING COLLAR OF U-SHAPE IN THE LINING BAG,COMPRISING, IN COMBINATION, A MANDREL WHEEL COMPRISING A PLURALITY OFFORMING MANDRELS, APPARATUS COMPRISING A PAIR OF DRAW ROLLERS FORFEEDING IN A HORIZONTAL PLANE TO THE FORMING MANDRELS A WEB OF PACKAGINGMATERIAL FROM A SUPPLY ROLL, APPARATUS FOR FEEDING TOWARDS THE PATH OFFEED OF THE WEB OF PACKAGING MATERIAL IN A HORIZONTAL PLANE A WEB OFCARDBOARD FROM A SUPPLY ROLL, THE WIDTH OF WHICH IS EQUAL TO THE LENGTHOF A REINFORCING COLLAR, A CUTTING DEVICE ARRANGED ALONG THE PATH OFFEED OF THE WEB OF CARDBOARD AND ADJACENT THE PATH OF FEED OF THE WEB OFPACKAGING MATERIAL FOR SEVERING REINFORCING COLLAR STRIPS FROM THE WEBOF CARDBOARD, THIS DEVICE BEING SO ARRANGED RELATIVELY TO THE PATH OFFEED OF THE WEB OF PACKAGING MATERIAL THAT THE REINFORCING COLLAR STRIPSARE CORRECTLY POSITIONED ON THIS WEB, A DEVICE ARRANGED ALONG THE PATH